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Date: Fri, 16 Sep 2011 02:02:37 +0700
From: Eugene Grosbein <egrosbein@rdtc.ru>
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Cc: stable@freebsd.org, John Baldwin <jhb@freebsd.org>, yongari@freebsd.org
Subject: Re: busdma MFC broke ipfw fwd for RELENG_6
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16.09.2011 01:15, YongHyeon PYUN пишет:

> I remember re(4) in 6.x also have a couple of bus_dma(9) bugs. How
> about applying the following revision?
> http://svnweb.freebsd.org/base?view=revision&revision=175337
> Not sure whether it shall apply cleanly.

It does not and there is too much differences in the code for my skills to apply manually :-)

> Alternatively try replacing BUS_DMA_ALLOCNOW to 0 in
> bus_dma_tag_create(9).

I'm not sure I undersdand this right... Do you mean this change?
This is the only place in busdma_machdep.c where BUS_DMA_ALLOCNOW is used.

--- busdma_machdep.c.orig       2011-09-16 01:56:52.000000000 +0700
+++ busdma_machdep.c    2011-09-16 01:57:01.000000000 +0700
@@ -284,7 +284,7 @@
                newtag->flags |= BUS_DMA_COULD_BOUNCE;
 
        if (((newtag->flags & BUS_DMA_COULD_BOUNCE) != 0) &&
-           (flags & BUS_DMA_ALLOCNOW) != 0) {
+           (flags & 0) != 0) {
                struct bounce_zone *bz;
 
                /* Must bounce */

I'm going to lose control on this remote box if I apply wrong patch for re(4).

Eugene Grosbein